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Tuna (half) Calories
High protein, source of omega-3, low fat
In season: Spring · Summer · Autumn · Winter
CALORIES · 100 G
GI
POTASSIUM · 100 G
FIBER · 100 G
Quick answer
1 piece (half) of Tuna (half) (85 g) has 112 calories. That works out to 132 calories per 100 g. It contains 0 g of carbs, 23.8 g of protein, 0.9 g of fat and 0 g of fiber. Its 1.9 µg of B12 covers 78% of the Daily Value. Its glycemic index is 0 (low), so it raises blood sugar slowly.
Tuna (half) Nutrition Facts
Selected: 1 piece (half) · 85 g
112
KCAL / 85G
Carbs
0g
· 0% DV
Protein
23.8g
· 48% DV
Fat
0.9g
· 1% DV
Fiber
0g
· 0% DV
DV is the share of the daily value covered, on a 2,000 kcal reference diet.
Calories come from: Carbs 0% · Protein 92% · Fat 8%
Tuna (half) nutrition facts table · 1 piece (half) (85 g)
| Nutrient | Amount | % DV |
|---|---|---|
| Calories | 112 kcal | |
| Total fat | 0.9 g | 1% |
| Saturated fat | 0.17 g | 1% |
| Trans fat | 0 g | |
| Sodium | 33 mg | 1% |
| Total carbohydrate | 0 g | 0% |
| Fiber | 0 g | 0% |
| Protein | 23.8 g | 48% |
Calories: Calories measure energy. Average daily need is 2,000 kcal. Excess calories are stored as fat, too few cause weight loss.
Carbs: Your body's primary energy source. The brain runs exclusively on carbs. Daily need: 275g.
Protein: Essential for muscle repair and cell growth. Daily need: 50g. Keeps you full and boosts metabolism.
Fat: Needed for hormone production and vitamin absorption. Daily need: 78g. Limit saturated fats, choose unsaturated.
Fiber: Critical for digestive health and satiety. Daily need: 28g. Stabilizes blood sugar, lowers cholesterol.
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How Many Calories in ½ Tuna (half)?
| Serving | Amount | Calories |
|---|---|---|
| 1 piece (half) | 85 g | 112 kcal |
| 1 tablespoon (chopped) | 15 g | 20 kcal |
| 1 piece (quarter) | 42 g | 55 kcal |
| 1 can (small) | 60 g | 79 kcal |
| 100 g | 100 g | 132 kcal |
| 1 serving (medium) | 100 g | 132 kcal |
| 1 can (medium) | 120 g | 158 kcal |
| 1 serving (large) | 150 g | 198 kcal |
| 1 cup (shredded) | 150 g | 198 kcal |
| 1 piece (whole) | 170 g | 224 kcal |
Calculated from 132 calories per 100 g.
Frequently Asked Questions About Tuna (half)
Is tuna healthy to eat?
Yes, tuna is a protein-rich fish that provides omega-3 fats and is naturally low in fat. Grilling or baking it and serving it with vegetables makes an easy meal; vary the fish you eat rather than relying on tuna alone.
Does tuna contain mercury?
Yes, tuna contains mercury, and levels vary by species and fish size. Larger tuna species tend to accumulate more, so choosing a variety of seafood instead of eating tuna very frequently is a sensible way to limit exposure.
Can you eat tuna during pregnancy?
Yes, tuna can be eaten during pregnancy, but the species and amount matter, and it should be thoroughly cooked. Mercury levels differ among tuna types, so ask your doctor which choices and portions are appropriate for you.
Can you eat tuna raw?
Yes, tuna can be eaten raw when it has been sourced and handled specifically for raw consumption and kept properly chilled. Freezing tuna at home does not guarantee that it is free of every food-safety risk.
How do you cook a tuna steak?
Pat the tuna dry, heat a pan or grill well, and cook the steak briefly. Thickness affects cooking time, so there is no single time that suits every piece; make sure it reaches a safe internal temperature.
Why does tuna steak become dry?
Tuna steak becomes dry and tough when it is overcooked. Because tuna is lean, it loses moisture quickly; cook it briefly over high heat and avoid repeatedly turning it.
How should you store fresh tuna?
Keep fresh tuna covered in the coldest part of the refrigerator and cook it promptly. Prevent raw fish juices from touching other foods, and discard tuna with a sour or unusually strong smell.
Can you freeze fresh tuna?
Yes, fresh tuna can be frozen. Wrap it airtight to protect its quality, thaw it in the refrigerator, and do not refreeze it after thawing.
What is the difference between fresh and canned tuna?
Fresh tuna is raw fish that you cook before eating, while canned tuna has been cooked and sealed for storage. Canned tuna is convenient and shelf-stable, but its salt and added oil vary by product.
Should you rinse tuna before cooking it?
No, rinsing tuna under running water is unnecessary and can spread bacteria around the kitchen through splashes. Pat the fish dry with paper towels, then wash your hands and clean any utensils or surfaces that touched it.
Tuna (half) Vitamins & Minerals
Vitamins
B12
1.87µg · 78% DV
B3
7.31mg · 46% DV
B6
0.77mg · 45% DV
Vitamin D
2.13µg · 11% DV
Minerals
Selenium
31µg · 56% DV
Phosphorus
213mg · 30% DV
Iodine
43µg · 29% DV
Magnesium
43mg · 10% DV
Potassium ⭐
298mg · 9% DV
Sodium
33mg · 1% DV
Tuna (half) Glycemic Index
GLYCEMIC INDEX
GLYCEMIC LOAD
Accounts for portion size — a more realistic measure than GI alone.
How to Burn Off Tuna (half)
To burn the 112 calories in 1 piece (half) (85 g):
🚶
Walking (5 km/h)
🏃
Running (8 km/h)
🚴
Cycling
🏊
Swimming
Times are calculated with the MET equation for a 70 kg adult. Actual burn varies with your weight, age and pace.
What is Tuna (half)?
Tuna is a large saltwater fish, eaten fresh or preserved. A half portion of tuna can serve as part of a meal, whether the fish is cooked or used in a cold dish.
Its firm, meaty flesh has a savoury flavour. In many places, fresh tuna is grilled or seared, while canned tuna is a familiar addition to sandwiches, salads and pasta. It is lean and protein-rich, and provides omega-3 fats. Pair it with vegetables, beans or leafy greens for a balanced meal; lemon and herbs complement its flavour without adding much richness.
How Nutritious Is Tuna (half)?
Nutrient density
Very high
How many vitamins, minerals and how much fiber this food carries per calorie. A high score means a lot of nutrition for few calories.
Satiety score
Medium
An EatBetter score computed from fiber, protein and calorie density. A high score means staying full longer on the same calories.
Both scores are calculated per 100 g and do not change with the selected portion. The satiety score is EatBetter's own calculation, not a clinical measure.
Is Tuna (half) Processed?
NOVA 1
Unprocessed
1. Unprocessed
2. Minimally Processed
3. Processed
4. Ultra-Processed
NOVA classifies foods into 4 groups by industrial processing. NOVA 1 (unprocessed) is the healthiest.
Does Tuna (half) Contain Allergens?
Contains these allergens:
Which Diets Is Tuna (half) Good For?
Vegan
— Not suitable
Vegetarian
— Not suitable
Gluten-Free
✓ Suitable
Dairy-Free
— Not suitable
Mediterranean
✓ Suitable
Paleo
✓ Suitable
Whole30
— Not suitable
DASH
— Not suitable
Keto
✓ Suitable
Low FODMAP
— Not suitable
Tuna (half) Fat Profile
SATURATED
0.17g
MONOUNSATURATED
0.17g
POLYUNSATURATED
0.6g
Omega 6:3 ratio 0:1
Below the ideal 4:1 — a good omega balance.
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Nutrition data compiled from USDA FoodData Central and scientific sources.